postfix-queue taking a LONG time on large mails

Hi,

I recently switched to postfix and thus am now using the postfix-queue
plugin. Everything looked fine. But now I have noticed that sending
a mail with a large attachment (e.g. 10 MB) causes the queue plugin to
hang really really long on datapost, only after over two minutes I get
the "250 Queued! ...". This causes many clients to timeout.

Anyone know what the reason for this might be? Is this a general problem
of the postfix-queue plugin?

Regards
Michael

-- 
It's an insane world, but i'm proud to be a part of it. -- Bill Hicks